/* Copyright (c) 2018 Anakin Authors, Inc. All Rights Reserved.

   Licensed under the Apache License, Version 2.0 (the "License");
   you may not use this file except in compliance with the License.
   You may obtain a copy of the License at

       http://www.apache.org/licenses/LICENSE-2.0

   Unless required by applicable law or agreed to in writing, software
   distributed under the License is distributed on an "AS IS" BASIS,
   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   See the License for the specific language governing permissions and
   limitations under the License.
*/

#ifndef ANAKIN_SABER_FUNCS_SROI_ALIGN_H
#define ANAKIN_SABER_FUNCS_SROI_ALIGN_H

#include "saber/funcs/base.h"
#include "saber/funcs/impl/impl_base.h"
#include "saber/funcs/impl/impl_sroi_align.h"

#ifdef USE_X86_PLACE
#include "saber/funcs/impl/x86/saber_sroi_align.h"
#endif
#ifdef USE_ARM_PLACE
#include "saber/funcs/impl/arm/saber_sroi_align.h"
#endif

namespace anakin {
namespace saber {

template<typename TargetType,
        DataType OpDtype>
class SRoiAlign : public BaseFunc<
        TargetType,
        OpDtype,
        ImplBase,
        SRoiAlignParam> {
public:
    using BaseFunc<
            TargetType,
            OpDtype,
            ImplBase,
            SRoiAlignParam>::BaseFunc;

    SRoiAlign() = default;

    virtual SaberStatus compute_output_shape(
            const std::vector<Tensor<TargetType> *> &input,
            std::vector<Tensor<TargetType> *> &output,
            SRoiAlignParam<TargetType> &param) override {

        //input[1] is roi.
        Shape output_shape = input[0]->valid_shape();
        CHECK_EQ(input.size(), 2) << " input's size must be 2.";

        int num_index = input[0]->num_index();
        int channel_index = input[0]->channel_index();
        int height_index = input[0]->height_index();
        int width_index = input[0]->width_index();

        output_shape[num_index] = input[1]->num();
        output_shape[channel_index] = input[0]->channel();
        output_shape[height_index] = param.pooled_h;
        output_shape[width_index] = param.pooled_w;

        return output[0]->set_shape_without_layout(output_shape);
    }

    virtual SaberStatus init_impl(ImplEnum implenum) override {
        switch (implenum) {
            case VENDER_IMPL:
                this->_impl.push_back(new VenderSRoiAlign <TargetType, OpDtype>);
                return SaberSuccess;

            case SABER_IMPL:
                this->_impl.push_back(new SaberSRoiAlign <TargetType, OpDtype>);
                return SaberSuccess;

            default:
                return SaberUnImplError;
        }
    }

private:

    virtual void pick_best_static() override {
        this->_best_impl = this->_impl[0];
    }

    virtual void pick_best_specify(ImplEnum implenum) override {
        this->_best_impl = this->_impl[0];
    }

};

} // namespace saber
} // namespace anakin

#endif
